Exploració per tema "Antennas (Electronics)"

Ara es mostren els items 21-40 de 319

    • A submillimeter wave parabolic reflector by additive manufacturing 

      Romeu Robert, Jordi; Aguasca Solé, Alberto; Blanch Boris, Sebastián; O'Callaghan Castellà, Juan Manuel; Jofre Roca, Lluís; Buitrago Ventura, Santiago (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The manufacturing of prototype of an offset parabolic reflector to operate at 120 GHz is presented. The paper describes the different metallization options to achieve a good performance.

    • Acquisition and Tracking algorithms for Phased Array Antenna based systems 

      Ortega González, Héctor (Universitat Politècnica de Catalunya, 2020-09)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Airbus Defence and Space
      With the advent of an increasing number of high-throughput telecommunication satellite constellations in Low Earth Orbit (LEO), tracking performance requirements for User Terminals (UTs) have become more stringent. A way ...

    • Active microwave imaging: a cylindrical system for biomedical applications 

      Jofre Roca, Lluís; Broquetas Ibars, Antoni; Hawley, Mark (1988)
      Text en actes de congrés
      Accés obert
      The authors examine the use of active microwave tomography as an imaging technique which gives information on the dielectric properties of the body. They show that a cylindrical system is an efficient option to obtain ...

    • Advanced embedded UWB T-Match Antenna System for RFID sensing 

      González López, Giselle (Universitat Politècnica de Catalunya, 2018-07)
      Projecte Final de Màster Oficial
      Accés obert
      A great deal of interest is placed nowadays in the so called Internet of Things (IoT), it is said to be part of the society of the future where all devices are at the same time connected to the internet and among them. ...

    • Advances in antenna technology for wireless handheld devices 

      Anguera Pros, Jaume; Andújar Linares, Aurora; Huynh, Minh-Chau; Orlenius, Charlie; Picher, Cristina; Puente Baliarda, Carles (2013)
      Article
      Accés obert
      The constant evolution of wireless handheld devices together with the apparition of multiple wireless communication systems fosters the antenna community to design new radiating and measurements systems capable of satisfying ...

    • Agrupación submuestreada operando en modo fractón utilizando antenas microstrip inspiradas en el fractal de Sierpinski 

      Anguera Pros, Jaume; Montesinos, Gemma; Puente Baliarda, Carles; Borja, C.; Soler, Jordi (Unión Científica Internacional de Radio (URSI), 2003)
      Text en actes de congrés
      Accés obert
      A high-directivity microstrip array using mul- tilevel elements based on a fractal geometry is theoretically compared with one using a circular patches. Within the same electrical area, the same directivity can be ...

    • Alignment of terahertz transmission setups with free-space laser photoconductive switches 

      Nuño Gómez, Daniel-Juan; Vega Piña, Sara; Santos Blanco, M. Concepción (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      A systematic procedure for ensuring perfect alignment of Photoconductive Antennas (PCA) in transmittance measure setups with free-space laser PCA gap feeding and mechanical adjust of silicon substrate lenses is presented. ...

    • Alineament d'interferències, gestió d'interferències i diversitat de polarització 

      Gurrera Edo, Aniol (Universitat Politècnica de Catalunya, 2015-03-19)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] This project deals with the interference management in multiuser environments through the K-User MxN MIMO Interference Channel (IC)

    • An alternative wearable tracking system based on a low-power wide-area network 

      Fernández García, Raúl; Gil Galí, Ignacio (2017-03-14)
      Article
      Accés obert
      This work presents an alternative wearable tracking system based on a low-power wide area network. A complete GPS receiver was integrated with a textile substrate, and the latitude and longitude coordinates were sent to ...

    • An approximate expression to estimate signal-to-noise improvement in cylindrical near-field measurements 

      Romeu Robert, Jordi; Jofre Roca, Lluís; Cardama Aznar, Ángel (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1994-07-01)
      Article
      Accés obert
      A very simple approximate expression for the process gain (PG) for the cylindrical case is derived. The different approximations and assumptions required to obtain this expression are shown. This expression might be useful ...

    • An embroidered passive textile RFID tag based on a T-matched antenna 

      El Bakkali, Mohamed; El Mrabet, Otman; Kanjaa, Mohammed; Gil Galí, Ignacio; Fernández García, Raúl (2021-12-21)
      Article
      Accés obert
      This paper addresses the design and fabrication of an embroidered textile RFID tag antenna. The main feature of this design is that we have embroidered an RFID chip on the textile support which avoids the use of metallic ...

    • An UWB Tapered Slot Vivaldi Antenna (TSA) with improved characterestics 

      Akazzim, Youness; Kanjaa, Mohammed; El Mrabet, Otman; Jofre Roca, Lluís; Essaaidi, Mohamed (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this paper, an UWB Tapered Slot Vivaldi Antenna (TSA) is presented. The proposed TSA is optimized in order to increase the bandwidth and ensure a good impedance matching at low and bandwidth frequencies while respecting ...

    • Analisis de antenas de reflector mediante procesado grafico 

      Rius Casals, Juan Manuel (1991)
      Text en actes de congrés
      Accés obert
      This paper shows a fast algorithm to calculate first contribution to the pattern radiation of a reflector antenna using the hardware capabilities of a high performance graphic workstation . It allows to design interactively ...

    • Analysis of a plasmonic graphene antenna for microelectronic applications 

      Suessrneier, C.; Thiel, F.; Wigger, Anna K.; Bolívar, Peter Haring; Abadal Cavallé, Sergi; Alarcón Cot, Eduardo José; Cabellos Aparicio, Alberto; Banszcrus, L.; Stampfer, C.; Lemme, M. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Graphene offers a large potential to downscale antennas to the micrometer scale, due to its special dispersion relation and its ability to support plasmons in the THz frequency range. For an adequate performance of the ...

    • Analysis of fractal-shaped antennas using the multiperiodic travelling wave Vee model 

      Puente Baliarda, Carles; Soler, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A novel analytical model to predict the radiation performance of the Sierpinski fractal multiband antenna is presented. The theoretical development allows one to accurately predict the antenna response to flare angle ...

    • Analysis of PIFA antenna coupling in nearby traces and reduction with CSRRs in PCB at 2.45 GHz 

      Gil Galí, Ignacio; Fernández García, Raúl (Institute of Electrical and Electronics Engineers (IEEE), 2015)
      Text en actes de congrés
      Accés obert
      The electromagnetic coupling of a conventional planar inverted-F antenna (PIFA) antenna in the nearby layout traces is investigated in the 2.45 GHz industrial, scientific and medical radio band. The impact of a complementary ...

    • Analysis of the accuracy of actuation electronics in the laser interferometer space antenna pathfinder 

      Armano, M.; Audley, H.; Baird, J.; Ramos Castro, Juan José (2020-04-01)
      Article
      Accés obert
      The Laser Interferometer Space Antenna Pathfinder (LPF) main observable, labeled ¿g, is the differential force per unit mass acting on the two test masses under free fall conditions after the contribution of all non-gravitational ...

    • Analysis of the estimation errors of the arrival angles on automotive radars 

      Rojas Acevedo, Daniel Fernando (Universitat Politècnica de Catalunya, 2020-06)
      Treball Final de Grau
      Accés restringit per acord de confidencialitat

    • Análisis de Errores de Medida en Campo Próximo Cilíndrico 

      Soneira Ferrando, M. José; Clavera, Jordi; Jofre Roca, Lluís; Romeu Robert, Jordi; de los Reyes, Elías (Universidad Politécnica de Madrid (UPM), 1988)
      Text en actes de congrés
      Accés obert
      A prograrn to compute near and far fields generated by a planar array has been developed . Sirnulations on the effect of antenna and rnesurernent errors in the cylindrical near-far field transforrnations algorithrns have ...

    • Análisis de Soluciones de Antena para Smartphones 

      Teotino Márquez, Anna (Universitat Politècnica de Catalunya, 2015-11)
      Projecte/Treball Final de Carrera
      Accés obert
      Nowadays phones must integrate a great number of services in a limited space in order to satisfy the user demands. New frequency bands appear for allocate new communication standards and the physical limitations of the ...